Theft deterrent backpack



FIG. 1 is a rear-end view of the theft deterrent backpack;

FIG. 2 is a front-end view thereof;

FIG. 3 is a top left rear perspective view thereof;

FIG. 4 is a top right rear perspective view thereof; and,

FIG. 5 is a bottom view thereof.

The broken lines shown in the Figures are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a theft deterrent backpack, as shown and described. 